並列タイトル等第1報
Effects of design parameters and operating conditions on spray characteristics of annular-liquid-film-type airblast atomizers: Comparison among atomizers with different designs
First report
タイトル（掲載誌）宇宙航空研究開発機構研究開発資料 = JAXA Research and Development Memorandum
一般注記The effects of design parameters and operating conditions on spray characteristics of annular-liquid-film-type airblast atomizers are currently under investigation to obtain insights into the development of high-performance aero-engine fuel injectors. As the first attempt of a series of studies on this issue, this paper provides a review of results obtained by the authors, on atomizers of different designs for both practical and research use. Comparison of the experimental results shows that counter-swirl combinations of airflow sandwiching an annular liquid film result in narrower spray dispersion than co-swirl cases, but the trend with respect to atomization characteristics is not as clear as is seen in some literatures. The results on a non-prefilming atomizer show that, with counter-swirl combinations of airflow, the case in which the liquid-swirl direction is the same as that of the outer air swirl shows better atomization performance than its counterpart. The designs causing acceleration of air velocity near the atomizer lip seem to improve atomization but also to result in narrower spray angles. The atomization performance is improved by increasing normalized air pressure drop across atomizers or by increasing ambient pressure and their effects on the spray dispersion pattern could be explained by simple Stokes number analysis. On the other hand, the effect of the air-to-liquid mass flow rate ratio is small and sometimes unclear. In the paper, a problem on the evaluation of atomization performance by using concentration-based measurement techniques is also briefly discussed. Finally, suggestions for future work are made, including more systematic approach for better physical understandings, and some strategies for good atomizer designs are also proposed.
資料番号: AA0063888000
レポート番号: JAXA-RM-06-014
一次資料へのリンクURLhttps://jaxa.repo.nii.ac.jp/?action=repository_action_common_download&item_id=2627&item_no=1&attribute_id=31&file_no=1
連携機関・データベース国立情報学研究所 : 学術機関リポジトリデータベース（IRDB）（機関リポジトリ）
提供元機関・データベース宇宙航空研究開発機構 : 宇宙航空研究開発機構リポジトリ